Baking oven



April 10, 1928. 1,665,551.

M. JOHNSON BAKING OVEN Filed March 22. 1924 5 SheetS-Sheet l April 10, 1928; 1,665,551

M. JOHNSON BAKING OVEN Filed March 22. 1924 3 Sheets-Sheet 2 M. JOHNSON April 10,1928;

BAKING OVEN Filed March 22. 1924 3 Sheets-Sheet 5 Patented Apr. 10, 1928.

UNITED stares P mce. 1

MATTS JOHNSON, OF SPOKANE, WASHINGTON; ASSIGNOR- F CNN-FOURTH TO NELSON AND ONE-FOlIlR-TI-I TO OSCAR CABLSON, BOTH OF SIOKANE, WASHINGTON. I

Bennie oven.

Application filed March'22, 1324 serial in). 700,991.

.The present invention relates to improvements in baking ovens especially adapted several parts of the stove-or furnace are adapted to be readily separated in order to insure packing into a small compass for facile transportation and shipment, and also to provide for easy manipulation in. assembling the stove or furnace as well as in dismantling the structure.

In the present form of the invention as illustrated the oven "is enclosed within a heating chamber receiving heat from a the .pot beneath the oven in which coal is pref erably used for fuel, although otherforms of fuel may be utilized. Means are provided for adjusting or'varying the size and capacity ofthe baking chamber of the oven, and means are also provided fordirecting' the path of gases of combustion and heat currents around the oven in orderthat halting may take place therein-with economy in fuel and in such manner asto insure proper and correct conditions for baking various articles as required. q

The invention consists in certain novel features of construction and combinations and arrangementsof parts aswill be hereinafter more fully "set forth. r I V In the accompanying drawings I have illustrated one complete examplcoflthe physical embodiment of my invention wherein the parts are combined and arranged in accordance with the best mode'Ivhave thus far devised for the practicalapplication of the principles of my invention. 1

Figure 1 is a front view in elevationof a invention is embodied for use.

stove or furnace in. which the ovenof. my

Figure 2 is a detail view in side elevation showing a portion of the frontof the stove ported upon brackets.

Figure 3 is a. detail view partly insection showing the operation and positions of interior, adjustable heat deflectingplates used in connection with. the oven. v v Figure 4 is an enlargechvertical, trans verse sectional'viewof the stove or furnace, illustratingthe relative positions of the oven, fire-pot and other elements of the structure. Figure 5 is a view in perspective of one or furnace with the oven door open and supof a duplicate pair of exterior "clamping Figure 6 is a longitudinal, vertical sectional view ofthe furnace and oven.

v Figure 7 detached. I I

In carrying out my invention I preferably utilize a furnace structure of oblong shape with rectangular-- walls and. 0f separable parts including. the bottom plate 1' of metal, at the underside of which are. detachably secured the four corner legs 2, for elevating the structure to a suitableheight. The front plate 3 and rear-plate 4L, togetherwith the two side wall-s 5 and top 6 complete the en closing structure of, the furnace.

The two side wallsand the front and rear walls of the stove structure are each fashioned with. upper and lower exterior, horizontally extendingfflanges 7 which project outwardly theref j'omto the edges'ofthe bottom and top plates respectively, and these two thicknesses of. material are embraced by a pa r of retaining frames of which the bot- 'tom' one is designated 8 andthe top one 9.

seen 1n F1gure5 each frame is of'rectangularform. and made up of four sections 10 of channel iron or U-shapev 111 CIOSSSBClEIOII and the sectionshave mitered ends as shown.

These frames ci'nbrace the outer edges of the for retaining the frames in position forming a rigid stove structure.

' The fire pot extends longitudinally er the is; a perspective view of the oven" stove and its w alls 13 of metal rest upon the 'bottom'fplate ofthe stove which is slotted within the area of the refractory lining l4 of the firepot; The metallic plates 13 form ing the sidewalls'of the fire pot are flanged as at 18"and these flanges are screwed or bolted to, the slotted bottom plate asseen ,in Figure' h lVithin the .firepot and upon a level withthe bottom plate 1' is arranged anoscillating or oscillatory grate 1 5 of suit- "able sti'iucture, and below the. grate a detachable ash-pan 16 suspended. The pan atits.

upper longitudinal edges is fashioned with outwardlv extending guidelfianges 17, slidable in the trackways 18 attached at the underside of the bottom plate 1, audit will 'be apparent that the ashpan may with confire supported on the grate 15.

At the exterior of the front plate 3 a well known type of oven door 19 is hingedat 19 to swing outwardly and downwardly, and when in this outward position the door is a supported in horizontal position on a pair of swinging bracket arms 20 pivoted at 20 near the respective eudsof the oven door.

Fuel is supplied to the grate through the opening in the front plate below the oven door, which is closed the hinged door 21 that is provided with a draftslide or damper 22 of suitable type, and additional dampers 23 may be provided. in the front plate adja cent to the lower corners of the fuel door.

Within the walls of the stove structure an ample heating chamber 24- is provided to receive heat from the burning fuel in the grate, and the oven is suspended in this chamber above the grate and in positionto receive heat from "the upwardly moving gases of combustion and heat currents from the tire.

The oven is made up of two sections, the lower one of which is fixed within the heating chamber and comprises a metal bottom plate 25 and side plates 26 extending upwardly therefrom, and a refractory lining of fire brick or other suitable material indicated at 27 is provided within this section. The section of the oven extends from front to rear of the heating chamber and at its endsis closed by these front and rear walls of the heating chamber. Atthe underside of thebottom plate 25 of the oven depending end-flanges 28 are fashioned, and bolts or screws 29 may be utilized to secure the flanged bottom plate of the oven to the front 7 and rear walls of the heating chamber, as bestseen. in Figures 4 and 6.

The top section of the oven is movable and adjustable with relation to the lower section of the oven for the purpose of varymg the interior cubicle contents of the oven to adapt 1t for various artlcles to be baked.

This movable and adjustable top section comprises a top metallic plate 30 having side walls or flanges 3ldepending therefrom and adapted to telescope withinthe side walls 26 of the lower section. Upright guide bars 30 may be provided within the lower section of the oven to guide the walls 31 of the upper section in their vertical movement and to close the ends of the oven against ingress of gases of combustion.

The adjustable oven section is moved vertically with. relation to the lower oven section through the i-nstrumentality of a pair of screw bars 32 one ofwh-ich is secured near each end of the oven section, and the screw bars are of course centrally alined on the top of this movable section. These screw bars project upwardly through bearing openings 33 in the top plate 6 of the stove, and hand wheels 34 threaded on these screw bars are utilized in well known manner to elevate or permit lowering of the oven top when the wheels are turned in proper manher on the screw bars.

the metal bottom and refractory lining therein. The heated currents of air then pass laterally from under the oven and up the exterior surfaces of the sides of the even, between the oven and the side walls of the stove as indicated in Figure at by passages/l at the respective sides of the oven. j

To guide and direct these upwardly moving heated air currents I utilize a pair of deflector plates 35 and 36 and a pair of spaced angle iron plates 37 which form a fiue 38 pipe 40. i a

The two deflector plates are hinged at 41, thehinge pins extending longitudinally of the heating chamber and preferably carried by the V Figure 4. Thesehinged deflector plates ex tend from front torear of the heating chamher, and their hinges arelocated just above the top of the upper oven section when the latter is in its uppermost position. i The free side plates of" thestove as seen in leading to the thimble 39' ofthesmoke' dotted, horizontal position to the angular positionin full lines as shown in Figure 4,

Onthe front of the stove an operating indicator 42 is provided for moving the deflector plates and indicating their position as best seen in Figure 3. j i In Figure 6 it will. be seen that while the hinged defiector plates extend the full length of the heating chamber, the spaced angle plates 37 which are attached at the under side of the top plate 6 of the stove, terminate a suitable distance from the front wall of the heating chamber to provide a transversely extending space 43 between the top plate of vthe oven and the top plate of the stove which is occupied by the complemental-y ends of the deflector plates. Thus the deflector plates maybe positioned to deflect the rising hot air currents over the top of the oven, and these currents then pass toward the front of the stove to the trans verse space 413' in which theyare collected. The air currents then pass longitudinally toward the back of the stove, through the thimble and thence through the smoke pipe 40. When the top section of the oven is lowcred the air currents passing over the top of the oven may enter the flue 38 by passing under the lower edges of the angle plates as well as by passing to the collection space 43. In any event the hot air currents are caused to pass in close contact over the oven" accurately be adapted for a variety 01' pur-. poses, diflerent foods. and various iorms of articles to be baked.

A convenient accessory for the stove is provided in the shelf 44 made up or metal and elevated above the top of the stove on legs 45, and an opening 46 is fashioned in this shelf for the accommodation of the smoke pipe 40 as shown in Fig. 6.

lVhen not desired for use it will be apparent that the structure maybe dismantled by first removing the upper and lower retaining frames, detaching the stove legs, then detaching the other removable parts as the top shelf, the fire p t, stove legs etc, for packing in a small space.

Having thus fully described my invention, what I claim as new and desire to secure by Letters Patent is The combination in a/furnace end, side and top and bottom walls to form a heating chamber, an'oven in said chamber and a grate below the oven, spaced plates attached at the under side of the top wall to form a fine located at the longitudinal center of said even andlthereabove and a smoke outlet to said flue, and'oppositely disposed, hinged deflector plates at the sides of said spaced plates and adapted to swing to adjusted position between the top of the 1even and the top wall of the heating chamer.

In testimony whereof I aiiix my signature.

MATTS JOHNSON.

comprising 

